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bad guy

baed gaI
part of speech: noun
definition 1: (informal) the villain or enemy in a fictional story.
We don't find out who the bad guy really is until halfway into the book.The actor says he enjoys playing the bad guy in movies.
definition 2: (; informal) the enemy in a war or other military engagement.
What were you doing while the rest of us were over there fighting the bad guys?
definition 3: (prec. by "the"; informal) a person who opposes or obstructs one in an interpersonal conflict.
I'm not the bad guy here! I'm actually trying to help you.
definition 4: (usu. pl.; informal) people with evil intentions or who are willing to do harm.
You don't seem to understand that there are a lot of bad guys out there and that you can't trust everybody.